diff options
Diffstat (limited to 'arch/tile/kernel/relocate_kernel_64.S')
| -rw-r--r-- | arch/tile/kernel/relocate_kernel_64.S | 263 |
1 files changed, 0 insertions, 263 deletions
diff --git a/arch/tile/kernel/relocate_kernel_64.S b/arch/tile/kernel/relocate_kernel_64.S deleted file mode 100644 index d9d8cf6176e8..000000000000 --- a/arch/tile/kernel/relocate_kernel_64.S +++ /dev/null @@ -1,263 +0,0 @@ -/* - * Copyright 2011 Tilera Corporation. All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation, version 2. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for - * more details. - * - * copy new kernel into place and then call hv_reexec - * - */ - -#include <linux/linkage.h> -#include <arch/chip.h> -#include <asm/page.h> -#include <hv/hypervisor.h> - -#undef RELOCATE_NEW_KERNEL_VERBOSE - -STD_ENTRY(relocate_new_kernel) - - move r30, r0 /* page list */ - move r31, r1 /* address of page we are on */ - move r32, r2 /* start address of new kernel */ - - shrui r1, r1, PAGE_SHIFT - addi r1, r1, 1 - shli sp, r1, PAGE_SHIFT - addi sp, sp, -8 - /* we now have a stack (whether we need one or not) */ - -#ifdef RELOCATE_NEW_KERNEL_VERBOSE - moveli r40, hw2_last(hv_console_putc) - shl16insli r40, r40, hw1(hv_console_putc) - shl16insli r40, r40, hw0(hv_console_putc) - - moveli r0, 'r' - jalr r40 - - moveli r0, '_' - jalr r40 - - moveli r0, 'n' - jalr r40 - - moveli r0, '_' - jalr r40 - - moveli r0, 'k' - jalr r40 - - moveli r0, '\n' - jalr r40 -#endif - - /* - * Throughout this code r30 is pointer to the element of page - * list we are working on. - * - * Normally we get to the next element of the page list by - * incrementing r30 by eight. The exception is if the element - * on the page list is an IND_INDIRECTION in which case we use - * the element with the low bits masked off as the new value - * of r30. - * - * To get this started, we need the value passed to us (which - * will always be an IND_INDIRECTION) in memory somewhere with - * r30 pointing at it. To do that, we push the value passed - * to us on the stack and make r30 point to it. - */ - - st sp, r30 - move r30, sp - addi sp, sp, -16 - - /* - * On TILE-GX, we need to flush all tiles' caches, since we may - * have been doing hash-for-home caching there. Note that we - * must do this _after_ we're completely done modifying any memory - * other than our output buffer (which we know is locally cached). - * We want the caches to be fully clean when we do the reexec, - * because the hypervisor is going to do this flush again at that - * point, and we don't want that second flush to overwrite any memory. - */ - { - move r0, zero /* cache_pa */ - moveli r1, hw2_last(HV_FLUSH_EVICT_L2) - } - { - shl16insli r1, r1, hw1(HV_FLUSH_EVICT_L2) - movei r2, -1 /* cache_cpumask; -1 means all client tiles */ - } - { - shl16insli r1, r1, hw0(HV_FLUSH_EVICT_L2) /* cache_control */ - move r3, zero /* tlb_va */ - } - { - move r4, zero /* tlb_length */ - move r5, zero /* tlb_pgsize */ - } - { - move r6, zero /* tlb_cpumask */ - move r7, zero /* asids */ - } - { - moveli r20, hw2_last(hv_flush_remote) - move r8, zero /* asidcount */ - } - shl16insli r20, r20, hw1(hv_flush_remote) - shl16insli r20, r20, hw0(hv_flush_remote) - - jalr r20 - - /* r33 is destination pointer, default to zero */ - - moveli r33, 0 - -.Lloop: ld r10, r30 - - andi r9, r10, 0xf /* low 4 bits tell us what type it is */ - xor r10, r10, r9 /* r10 is now value with low 4 bits stripped */ - - cmpeqi r0, r9, 0x1 /* IND_DESTINATION */ - beqzt r0, .Ltry2 - - move r33, r10 - -#ifdef RELOCATE_NEW_KERNEL_VERBOSE - moveli r0, 'd' - jalr r40 -#endif - - addi r30, r30, 8 - j .Lloop - -.Ltry2: - cmpeqi r0, r9, 0x2 /* IND_INDIRECTION */ - beqzt r0, .Ltry4 - - move r30, r10 - -#ifdef RELOCATE_NEW_KERNEL_VERBOSE - moveli r0, 'i' - jalr r40 -#endif - - j .Lloop - -.Ltry4: - cmpeqi r0, r9, 0x4 /* IND_DONE */ - beqzt r0, .Ltry8 - - mf - -#ifdef RELOCATE_NEW_KERNEL_VERBOSE - moveli r0, 'D' - jalr r40 - moveli r0, '\n' - jalr r40 -#endif - - move r0, r32 - - moveli r41, hw2_last(hv_reexec) - shl16insli r41, r41, hw1(hv_reexec) - shl16insli r41, r41, hw0(hv_reexec) - - jalr r41 - - /* we should not get here */ - -#ifdef RELOCATE_NEW_KERNEL_VERBOSE - moveli r0, '?' - jalr r40 - moveli r0, '\n' - jalr r40 -#endif - - j .Lhalt - -.Ltry8: cmpeqi r0, r9, 0x8 /* IND_SOURCE */ - beqz r0, .Lerr /* unknown type */ - - /* copy page at r10 to page at r33 */ - - move r11, r33 - - moveli r0, hw2_last(PAGE_SIZE) - shl16insli r0, r0, hw1(PAGE_SIZE) - shl16insli r0, r0, hw0(PAGE_SIZE) - add r33, r33, r0 - - /* copy word at r10 to word at r11 until r11 equals r33 */ - - /* We know page size must be multiple of 8, so we can unroll - * 8 times safely without any edge case checking. - * - * Issue a flush of the destination every 8 words to avoid - * incoherence when starting the new kernel. (Now this is - * just good paranoia because the hv_reexec call will also - * take care of this.) - */ - -1: - { ld r0, r10; addi r10, r10, 8 } - { st r11, r0; addi r11, r11, 8 } - { ld r0, r10; addi r10, r10, 8 } - { st r11, r0; addi r11, r11, 8 } - { ld r0, r10; addi r10, r10, 8 } - { st r11, r0; addi r11, r11, 8 } - { ld r0, r10; addi r10, r10, 8 } - { st r11, r0; addi r11, r11, 8 } - { ld r0, r10; addi r10, r10, 8 } - { st r11, r0; addi r11, r11, 8 } - { ld r0, r10; addi r10, r10, 8 } - { st r11, r0; addi r11, r11, 8 } - { ld r0, r10; addi r10, r10, 8 } - { st r11, r0; addi r11, r11, 8 } - { ld r0, r10; addi r10, r10, 8 } - { st r11, r0 } - { flush r11 ; addi r11, r11, 8 } - - cmpeq r0, r33, r11 - beqzt r0, 1b - -#ifdef RELOCATE_NEW_KERNEL_VERBOSE - moveli r0, 's' - jalr r40 -#endif - - addi r30, r30, 8 - j .Lloop - - -.Lerr: -#ifdef RELOCATE_NEW_KERNEL_VERBOSE - moveli r0, 'e' - jalr r40 - moveli r0, 'r' - jalr r40 - moveli r0, 'r' - jalr r40 - moveli r0, '\n' - jalr r40 -#endif -.Lhalt: - moveli r41, hw2_last(hv_halt) - shl16insli r41, r41, hw1(hv_halt) - shl16insli r41, r41, hw0(hv_halt) - - jalr r41 - STD_ENDPROC(relocate_new_kernel) - - .section .rodata,"a" - - .globl relocate_new_kernel_size -relocate_new_kernel_size: - .long .Lend_relocate_new_kernel - relocate_new_kernel |